- Open Access
Impaired plasma lipid profiles in acute hepatitis
© Luo et al; licensee BioMed Central Ltd. 2010
- Received: 16 November 2009
- Accepted: 23 January 2010
- Published: 23 January 2010
The present study examined plasma lipid profiles in thirty patients suffered from acute viral hepatitis. Patients' blood samples were collected at both the debut and recovery of diseases. Thirty sex and age matched normal subjects were included as controls. Plasma total triglycerides (TG), total cholesterol, high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), apolipoprotein AI (ApoAI), apolipoprotein B (ApoB), lipoprotein (a) (Lp(a)), blood coagulation status including prothrombin complex activity and activated partial tromboplastin time (APTT), and hepatic functions were determined by the automatic biochemical analytical instrument. It demonstrated that plasma levels of total cholesterol, HDL-C and apoAI were significantly lower in the patients at the acute phase of hepatitis than those in normal subjects, whereas plasma levels of TG and LDL-C were obviously higher in the patients than in normal subjects (P < 0.05). Moreover, we demonstrated that patients' plasma levels of total cholesterol, LDL-C, HDL-C and apoAI were lower at the active phase of the diseases than at the recovering phase, which indicating that acute liver damage could significant influence lipid metabolism in vivo. No pathological changes of blood coagulation status occurred in these patients during the study as all selected patients had moderate hepatitis. It may conclude that examinations of plasma lipid profile could be considered as a clinical index to reflect liver damage in the active phase of hepatitis.
- High Density Lipoprotein Cholesterol
- Acute Hepatitis
- Acute Viral Hepatitis
- Plasma Lipid Profile
- Endogenous Lipid
Liver is the most important organ for the metabolism of lipids, lipoproteins and apolipoproteins. Under normal circumstances, most plasma endogenous lipids and lipoproteins are synthesized in the liver and then are secreted into the blood circulation [1, 2]. And plasma lipoproteins are also mainly catabolism by the liver to maintain the relative balance of lipid and lipoprotein metabolism in vivo . It has been well documented that chronic liver dysfunction might interfere lipid metabolism in vivo and could change plasma lipid and lipoprotein patterns . Acute hepatitis may be referred to an inflammatory process of the liver lasting less than six months. In China, the most common etiology of acute hepatitis is viral infection, in which hepatitis A and hepatitis E are the most common causes. In clinical, the courses of acute hepatitis may vary widely from mild symptom that does not require treatment to the fulminant hepatic failure that needs emergency liver transplantation. Acute viral hepatitis is more likely to be asymptomatic in younger people. In addition, acute hepatitis may occur less commonly with infections such as Epstein-Barr virus, cytomegalovirus, adenovirus, herpes simplex and Coxsackie virus or with other noninfectious reasons. It has been demonstrated that in the acute and/or chronic liver diseases, hepatic function could be impaired and the circulating lipids and lipoproteins are not only present in abnormal amounts but they frequently also have abnormal composition including electrophoretic mobility and appearance . Previous studies pay more emphasis on changes of lipid metabolisms under chronic hepatitis and cirrhosis with or without hepatocellular carcinoma [5–7]. In the present study we followed plasma lipid and lipoprotein patterns of patients suffered from acute hepatitis to further explore the changes of lipid and lipoprotein profiles of the patients.
Patients and normal subjects
Characterization of patients and controls
Ages (Means ± SD)
41.7 ± 17.3
46.0 ± 13.6
24.6 ± 15.3
1227.9 ± 690.7
25 cases of acute jaundice viral hepatitis, 5 cases of non-jaundice
19 cases of HEV, 4 cases of HBV and seven cases of non-A non-E
10 cases of hepatomegaly, 4 cases of hepatic cyst and 1 case hepatic hemangioma
Viral tests of the patients
Viral load (copies/ml)
Antibody against virus
3.61 × 106 ± 6.30 × 106
Blood was collected from all subjects under standardised conditions after overnight fasting. Triglycerides (TG) and total cholesterol were determined by the endpoint detection (GPO-PAP Method, CHO-PAP Method). ApoA, apoB as well as Lp(a) were determined by the immunological turbidimetric method. All laboratory parameters were directly determined on an automatic biochemical analyzer (Olympus AU2700, Japan). Patients' coagulation status including prothrombin complex activity and activated partial tromboplastin time (APTT), were determined as a routine test and patients' coagulation status was at normal ranges.
Statistical analysis was performed with the GraphPad Prism version 5. Data are expressed as means ± SD. Differences between patients and healthy subjects were compared by the non-paired t-test. Lipid profiles in patients under different diseases phases were analyzed by the one-way ANOVA followed by the paired t-test. A p value less than 0.05 (P < 0.05) was considered as significant.
Liver is one of the most important organs for the metabolism of plasma apolipoproteins, endogenous lipids and lipoproteins. Most plasma apolipoproteins, endogenous lipids and lipoproteins are synthesized by the liver [1, 2], which depends on the integrity of cellular functions of liver [2, 3]. As in blood circulation lipids do not dissolve in plasma, they need in combination with different apolipoproteins to form lipoproteins that may transfer endogenous or exogenous lipids to different organs or tissues for further metabolism. Under normal physiological conditions, liver plays an important role to regulate lipid and lipoprotein metabolisms. Liver not only synthesizes and secretes endogenous lipoprotein, synthesis of key enzyme for the LDL metabolism, i.e., lecithin cholesterol acyltransferase (LCAT), hepatic lipase and apolipoproteins, but also regulates catabolism of various plasma lipoproteins via hepatic cellular surface lipoprotein receptors, which may maintain relative equilibrium of plasma lipids and lipoproteins in vivo [9, 10]. These processes could be interfered or impaired when hepatic cellular damage, which leads to an alteration of plasma lipid and lipoprotein patterns. And syntheses of cholesterol, triglycerides, apoAI, apoB and Lp(a) could be changed and their plasma concentrations will be altered correspondingly . Therefore, examination of plasma lipid and lipoprotein levels will be helpful to evaluate the extent of the hepatic damage. It is well known that plasma levels of cytokines, lipid peroxides and anti-oxidant status could be changed under acute or chronic hepatitis [12–14], which may also interfere the lipid metabolism in vivo.
In the present results we demonstrated that plasma levels of total cholesterol, HDL-C and apoAI were significantly lower in the patients at the acute phase of hepatitis than those in normal subjects, whereas plasma levels of triglycerides and LDL-C were obviously higher in the patients than in normal subjects. And patients' plasma levels of total cholesterol, LDL-C, HDL-C and apoAI were lower at the active phase of the diseases than at the recovering phase, which indicating that acute liver damage could significant influence lipid metabolism in vivo. It is well known that severe acute hepatitis is an serious acute inflammatory process that leads to a hepatic cellular necrosis . It has been reported when acute hepatitis occurred, liver function could be severely damaged, which could significantly inhibit hepatic apoAI synthesis . Serum levels of apoAI, apoAII and total cholesterol were negatively correlated to serious of liver damage [17–19]. According to our results and together with the literatures [20, 21] apoAI and HDL-C could be considered as the best indicator to evaluate accurately the liver damage. The combination of plasma levels of apoAI and HDL-C together with prothrombin activity and serum levels of bilirubin and transaminase could be a best index for evaluating the prognosis of acute hepatitis.
This research project was supported by the research grant of the Third Affiliated Hospital of Soochow University.
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